本文研究了嵩箕地区山西组的４条剖面，提出了嵩箕地工山西组时代为早二叠世早期（山西组下段）至早二叠世晚期（山西段），认为山西组是三角洲环......

The Xueshan Formation is a set of red coarse clastic deposit of land facies consisting mainly of lithic sandstone, pebbl......

The southern portion of the Sao Francisco Palaeocontinent in Brazil is denoted by Archean nuclei and Paleoproterozoic ma......